Hot electron injection regulation in Al&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;3&lt;/inf&gt;-filled epoxy resin composite using Cr&lt;inf&gt;2&lt;/inf&gt;O&lt;inf&gt;3&lt;/inf&gt; coatings

Li, Chuanyang; Hu, Jun; Lin, Chuanjie; He, Jinliang

doi:10.1109/ceidp.2016.7785544

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…A dense, ordered Cr2O3 nano-coating created by the magnetron sputtering method on the epoxy surface was verified as a good way to restrain charge injection from metal/insulation interface, which is due to deep traps introduced by the coating [33,51]. The effect of fluorination, plasma treatment, and Cr2O3 coating on charge suppression property using epoxy samples were compared and results showed that the Cr2O3 coating has the best charge injection suppression behavior, followed by surface fluorination as shown in Figure 21 [33].…”

Section: Cr2o3 Coatingmentioning

confidence: 99%

Gas–solid interface charge tailoring techniques: what we grasped and where to go

Zhang¹,

Wang²,

Teyssèdre³

et al. 2020

Nanotechnology

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Charging of insulators modifies local electric field distribution and increases potential threat to the safety of the gas insulated equipment. In this paper, surface charge tailoring techniques are classified and reviewed by introducing a Dam-flood model. Technical solutions of different charge tailoring methods are compared and discussed. The outlook of potential solutions to suppress charge accumulation is recommended and discussed based on industrial consideration.This paper serves as a guide handbook for engineers and researchers into the study of charge tailoring methods.Meanwhile, we hope that the content of this paper could shed some lights upon charge-free insulators to promote the industrial application of HVDC GIL/GIS.

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Section: Cr2o3 Coatingmentioning

confidence: 99%

Gas–solid interface charge tailoring techniques: what we grasped and where to go

Zhang¹,

Wang²,

Teyssèdre³

et al. 2020

Nanotechnology

Self Cite

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“…Li et al [90,91] deposited Cr 2 O 3 on the epoxy surface, found that deep traps were introduced and surface charge injection from the elec- trode was inhibited. He et al [92] focused on restraining the charge transport inside the bulk by doping K 2 Ti 6 O 13 whiskers into epoxybased material.…”

Section: Suppressing Charge From Volume Conductionmentioning

confidence: 99%

China's 10-year progress in DC gas-insulated equipment: From basic research to industry perspective

Zhang

et al. 2022

iEnergy

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The construction of the future energy structure of China under the 2050 carbon-neutral vision requires compact direct current (DC) gas-insulation equipment as important nodes and solutions to support electric power transmission and distribution of long-distance and large-capacity. This paper reviews China's 10-year progress in DC gas-insulated equipment. Important progresses in basic research and industry perspective are presented, with related scientific issues and technical bottlenecks being discussed. The progress in DC gas-insulated equipment worldwide (Europe, Japan, America) is also reported briefly.

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“…The epoxy insulator is extensively applied in gas insulated transmission line (GIL) due to its outstanding mechanical properties [1][2][3][4]. But the free charge is inevitably accumulated on the insulator surface under direct voltage (DC) stress, which will result in electric field distortion and unpredictable flashover along the insulator surface [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of surface charge inhibition performance on epoxy insulator under DC voltage by flexible coating strategy

et al. 2021

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Epoxy insulator is affected by surface charge accumulation under a strong electric field, which causes a decrease in the surface flashover voltage, threatening the safe operation of power equipment. This study reports on a flexible coating strategy for the insulator to inhibit the charge accumulation through numerical simulation. The experiment was conducted initially to reveal the charge accumulation feature. Then, the flexible coating method was proposed, in which the insulator surface was divided into three parts, and surface coatings with various conductivities were painted on the designated areas to adjust the charge distribution. Finally, the efficiency of such a coating strategy was estimated considering the temperature gradient. The results presented that the homo-charge was mostly deposited on the non-planar area of the spacer. The maximum charge density first decreased and then increased with increasing surface conductivity. The charge accumulation could be restrained by increasing the surface conductivity of insulator effectively. A significant suppression was achieved by properly coating with high conductivity at the nonplanar region and with low conductivity at the planar region. The suppression performance of such a strategy became reduced as the temperature gradient increased. The results indicate that the flexible coating can balance charge deposition in the non-planar region and restrain charge injection near the electrode, thereby inhibiting the charge accumulation.

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Hot electron injection regulation in Al<inf>2</inf>O<inf>3</inf>-filled epoxy resin composite using Cr<inf>2</inf>O<inf>3</inf> coatings

Cited by 4 publications

References 11 publications

Gas–solid interface charge tailoring techniques: what we grasped and where to go

Gas–solid interface charge tailoring techniques: what we grasped and where to go

China's 10-year progress in DC gas-insulated equipment: From basic research to industry perspective

Numerical simulation of surface charge inhibition performance on epoxy insulator under DC voltage by flexible coating strategy

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